/* GNU/Linux/x86-64 specific low level interface, for the remote server
for GDB.
- Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
+ Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GDB.
#include "linux-low.h"
#include "i387-fp.h"
#include "i386-low.h"
+#include "i386-xstate.h"
+#include "elf/common.h"
#include "gdb_proc_service.h"
-/* Defined in auto-generated file reg-i386-linux.c. */
+/* Defined in auto-generated file i386-linux.c. */
void init_registers_i386_linux (void);
-/* Defined in auto-generated file reg-x86-64-linux.c. */
-void init_registers_x86_64_linux (void);
+/* Defined in auto-generated file amd64-linux.c. */
+void init_registers_amd64_linux (void);
+/* Defined in auto-generated file i386-avx-linux.c. */
+void init_registers_i386_avx_linux (void);
+/* Defined in auto-generated file amd64-avx-linux.c. */
+void init_registers_amd64_avx_linux (void);
+/* Defined in auto-generated file i386-mmx-linux.c. */
+void init_registers_i386_mmx_linux (void);
+
+/* Backward compatibility for gdb without XML support. */
+
+static const char *xmltarget_i386_linux_no_xml = "@<target>\
+<architecture>i386</architecture>\
+<osabi>GNU/Linux</osabi>\
+</target>";
+
+#ifdef __x86_64__
+static const char *xmltarget_amd64_linux_no_xml = "@<target>\
+<architecture>i386:x86-64</architecture>\
+<osabi>GNU/Linux</osabi>\
+</target>";
+#endif
#include <sys/reg.h>
#include <sys/procfs.h>
#include <sys/ptrace.h>
+#include <sys/uio.h>
+
+#ifndef PTRACE_GETREGSET
+#define PTRACE_GETREGSET 0x4204
+#endif
+
+#ifndef PTRACE_SETREGSET
+#define PTRACE_SETREGSET 0x4205
+#endif
+
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
}
static void
-x86_fill_gregset (void *buf)
+x86_fill_gregset (struct regcache *regcache, void *buf)
{
int i;
{
for (i = 0; i < X86_64_NUM_REGS; i++)
if (x86_64_regmap[i] != -1)
- collect_register (i, ((char *) buf) + x86_64_regmap[i]);
+ collect_register (regcache, i, ((char *) buf) + x86_64_regmap[i]);
return;
}
#endif
for (i = 0; i < I386_NUM_REGS; i++)
- collect_register (i, ((char *) buf) + i386_regmap[i]);
+ collect_register (regcache, i, ((char *) buf) + i386_regmap[i]);
- collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
+ collect_register_by_name (regcache, "orig_eax",
+ ((char *) buf) + ORIG_EAX * 4);
}
static void
-x86_store_gregset (const void *buf)
+x86_store_gregset (struct regcache *regcache, const void *buf)
{
int i;
{
for (i = 0; i < X86_64_NUM_REGS; i++)
if (x86_64_regmap[i] != -1)
- supply_register (i, ((char *) buf) + x86_64_regmap[i]);
+ supply_register (regcache, i, ((char *) buf) + x86_64_regmap[i]);
return;
}
#endif
for (i = 0; i < I386_NUM_REGS; i++)
- supply_register (i, ((char *) buf) + i386_regmap[i]);
+ supply_register (regcache, i, ((char *) buf) + i386_regmap[i]);
- supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
+ supply_register_by_name (regcache, "orig_eax",
+ ((char *) buf) + ORIG_EAX * 4);
}
static void
-x86_fill_fpregset (void *buf)
+x86_fill_fpregset (struct regcache *regcache, void *buf)
{
#ifdef __x86_64__
- i387_cache_to_fxsave (buf);
+ i387_cache_to_fxsave (regcache, buf);
#else
- i387_cache_to_fsave (buf);
+ i387_cache_to_fsave (regcache, buf);
#endif
}
static void
-x86_store_fpregset (const void *buf)
+x86_store_fpregset (struct regcache *regcache, const void *buf)
{
#ifdef __x86_64__
- i387_fxsave_to_cache (buf);
+ i387_fxsave_to_cache (regcache, buf);
#else
- i387_fsave_to_cache (buf);
+ i387_fsave_to_cache (regcache, buf);
#endif
}
#ifndef __x86_64__
static void
-x86_fill_fpxregset (void *buf)
+x86_fill_fpxregset (struct regcache *regcache, void *buf)
{
- i387_cache_to_fxsave (buf);
+ i387_cache_to_fxsave (regcache, buf);
}
static void
-x86_store_fpxregset (const void *buf)
+x86_store_fpxregset (struct regcache *regcache, const void *buf)
{
- i387_fxsave_to_cache (buf);
+ i387_fxsave_to_cache (regcache, buf);
}
#endif
+static void
+x86_fill_xstateregset (struct regcache *regcache, void *buf)
+{
+ i387_cache_to_xsave (regcache, buf);
+}
+
+static void
+x86_store_xstateregset (struct regcache *regcache, const void *buf)
+{
+ i387_xsave_to_cache (regcache, buf);
+}
+
/* ??? The non-biarch i386 case stores all the i387 regs twice.
Once in i387_.*fsave.* and once in i387_.*fxsave.*.
This is, presumably, to handle the case where PTRACE_[GS]ETFPXREGS
struct regset_info target_regsets[] =
{
#ifdef HAVE_PTRACE_GETREGS
- { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
+ { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t),
GENERAL_REGS,
x86_fill_gregset, x86_store_gregset },
+ { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_X86_XSTATE, 0,
+ EXTENDED_REGS, x86_fill_xstateregset, x86_store_xstateregset },
# ifndef __x86_64__
# ifdef HAVE_PTRACE_GETFPXREGS
- { PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
+ { PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, 0, sizeof (elf_fpxregset_t),
EXTENDED_REGS,
x86_fill_fpxregset, x86_store_fpxregset },
# endif
# endif
- { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
+ { PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (elf_fpregset_t),
FP_REGS,
x86_fill_fpregset, x86_store_fpregset },
#endif /* HAVE_PTRACE_GETREGS */
- { 0, 0, -1, -1, NULL, NULL }
+ { 0, 0, 0, -1, -1, NULL, NULL }
};
static CORE_ADDR
-x86_get_pc (void)
+x86_get_pc (struct regcache *regcache)
{
int use_64bit = register_size (0) == 8;
if (use_64bit)
{
unsigned long pc;
- collect_register_by_name ("rip", &pc);
+ collect_register_by_name (regcache, "rip", &pc);
return (CORE_ADDR) pc;
}
else
{
unsigned int pc;
- collect_register_by_name ("eip", &pc);
+ collect_register_by_name (regcache, "eip", &pc);
return (CORE_ADDR) pc;
}
}
static void
-x86_set_pc (CORE_ADDR pc)
+x86_set_pc (struct regcache *regcache, CORE_ADDR pc)
{
int use_64bit = register_size (0) == 8;
if (use_64bit)
{
unsigned long newpc = pc;
- supply_register_by_name ("rip", &newpc);
+ supply_register_by_name (regcache, "rip", &newpc);
}
else
{
unsigned int newpc = pc;
- supply_register_by_name ("eip", &newpc);
+ supply_register_by_name (regcache, "eip", &newpc);
}
}
\f
{
unsigned char c;
- read_inferior_memory (pc, &c, 1);
+ (*the_target->read_memory) (pc, &c, 1);
if (c == 0xCC)
return 1;
struct process_info *proc = current_process ();
switch (type)
{
+ case '0':
+ return set_gdb_breakpoint_at (addr);
case '2':
case '3':
case '4':
struct process_info *proc = current_process ();
switch (type)
{
+ case '0':
+ return delete_gdb_breakpoint_at (addr);
case '2':
case '3':
case '4':
static void
x86_linux_prepare_to_resume (struct lwp_info *lwp)
{
+ ptid_t ptid = ptid_of (lwp);
+
if (lwp->arch_private->debug_registers_changed)
{
int i;
- ptid_t ptid = ptid_of (lwp);
int pid = ptid_get_pid (ptid);
struct process_info *proc = find_process_pid (pid);
struct i386_debug_reg_state *state = &proc->private->arch_private->debug_reg_state;
lwp->arch_private->debug_registers_changed = 0;
}
+
+ if (lwp->stopped_by_watchpoint)
+ x86_linux_dr_set (ptid, DR_STATUS, 0);
}
\f
/* When GDBSERVER is built as a 64-bit application on linux, the
return 0;
}
\f
+static int use_xml;
+
+/* Update gdbserver_xmltarget. */
+
+static void
+x86_linux_update_xmltarget (void)
+{
+ int pid;
+ struct regset_info *regset;
+ static unsigned long long xcr0;
+ static int have_ptrace_getregset = -1;
+#if !defined(__x86_64__) && defined(HAVE_PTRACE_GETFPXREGS)
+ static int have_ptrace_getfpxregs = -1;
+#endif
+
+ if (!current_inferior)
+ return;
+
+ /* Before changing the register cache internal layout or the target
+ regsets, flush the contents of the current valid caches back to
+ the threads. */
+ regcache_invalidate ();
+
+ pid = pid_of (get_thread_lwp (current_inferior));
+#ifdef __x86_64__
+ if (num_xmm_registers == 8)
+ init_registers_i386_linux ();
+ else
+ init_registers_amd64_linux ();
+#else
+ {
+# ifdef HAVE_PTRACE_GETFPXREGS
+ if (have_ptrace_getfpxregs == -1)
+ {
+ elf_fpxregset_t fpxregs;
+
+ if (ptrace (PTRACE_GETFPXREGS, pid, 0, (int) &fpxregs) < 0)
+ {
+ have_ptrace_getfpxregs = 0;
+ x86_xcr0 = I386_XSTATE_X87_MASK;
+
+ /* Disable PTRACE_GETFPXREGS. */
+ for (regset = target_regsets;
+ regset->fill_function != NULL; regset++)
+ if (regset->get_request == PTRACE_GETFPXREGS)
+ {
+ regset->size = 0;
+ break;
+ }
+ }
+ else
+ have_ptrace_getfpxregs = 1;
+ }
+
+ if (!have_ptrace_getfpxregs)
+ {
+ init_registers_i386_mmx_linux ();
+ return;
+ }
+# endif
+ init_registers_i386_linux ();
+ }
+#endif
+
+ if (!use_xml)
+ {
+ /* Don't use XML. */
+#ifdef __x86_64__
+ if (num_xmm_registers == 8)
+ gdbserver_xmltarget = xmltarget_i386_linux_no_xml;
+ else
+ gdbserver_xmltarget = xmltarget_amd64_linux_no_xml;
+#else
+ gdbserver_xmltarget = xmltarget_i386_linux_no_xml;
+#endif
+
+ x86_xcr0 = I386_XSTATE_SSE_MASK;
+
+ return;
+ }
+
+ /* Check if XSAVE extended state is supported. */
+ if (have_ptrace_getregset == -1)
+ {
+ unsigned long long xstateregs[I386_XSTATE_SSE_SIZE / sizeof (long long)];
+ struct iovec iov;
+
+ iov.iov_base = xstateregs;
+ iov.iov_len = sizeof (xstateregs);
+
+ /* Check if PTRACE_GETREGSET works. */
+ if (ptrace (PTRACE_GETREGSET, pid, (unsigned int) NT_X86_XSTATE,
+ &iov) < 0)
+ {
+ have_ptrace_getregset = 0;
+ return;
+ }
+ else
+ have_ptrace_getregset = 1;
+
+ /* Get XCR0 from XSAVE extended state at byte 464. */
+ xcr0 = xstateregs[464 / sizeof (long long)];
+
+ /* Use PTRACE_GETREGSET if it is available. */
+ for (regset = target_regsets;
+ regset->fill_function != NULL; regset++)
+ if (regset->get_request == PTRACE_GETREGSET)
+ regset->size = I386_XSTATE_SIZE (xcr0);
+ else if (regset->type != GENERAL_REGS)
+ regset->size = 0;
+ }
+
+ if (have_ptrace_getregset)
+ {
+ /* AVX is the highest feature we support. */
+ if ((xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK)
+ {
+ x86_xcr0 = xcr0;
+
+#ifdef __x86_64__
+ /* I386 has 8 xmm regs. */
+ if (num_xmm_registers == 8)
+ init_registers_i386_avx_linux ();
+ else
+ init_registers_amd64_avx_linux ();
+#else
+ init_registers_i386_avx_linux ();
+#endif
+ }
+ }
+}
+
+/* Process qSupported query, "xmlRegisters=". Update the buffer size for
+ PTRACE_GETREGSET. */
+
+static void
+x86_linux_process_qsupported (const char *query)
+{
+ /* Return if gdb doesn't support XML. If gdb sends "xmlRegisters="
+ with "i386" in qSupported query, it supports x86 XML target
+ descriptions. */
+ use_xml = 0;
+ if (query != NULL && strncmp (query, "xmlRegisters=", 13) == 0)
+ {
+ char *copy = xstrdup (query + 13);
+ char *p;
+
+ for (p = strtok (copy, ","); p != NULL; p = strtok (NULL, ","))
+ {
+ if (strcmp (p, "i386") == 0)
+ {
+ use_xml = 1;
+ break;
+ }
+ }
+
+ free (copy);
+ }
+
+ x86_linux_update_xmltarget ();
+}
+
/* Initialize gdbserver for the architecture of the inferior. */
static void
}
else if (use_64bit)
{
- init_registers_x86_64_linux ();
-
/* Amd64 doesn't have HAVE_LINUX_USRREGS. */
the_low_target.num_regs = -1;
the_low_target.regmap = NULL;
/* Amd64 has 16 xmm regs. */
num_xmm_registers = 16;
+ x86_linux_update_xmltarget ();
return;
}
#endif
/* Ok we have a 32-bit inferior. */
- init_registers_i386_linux ();
-
the_low_target.num_regs = I386_NUM_REGS;
the_low_target.regmap = i386_regmap;
the_low_target.cannot_fetch_register = i386_cannot_fetch_register;
/* I386 has 8 xmm regs. */
num_xmm_registers = 8;
+
+ x86_linux_update_xmltarget ();
+}
+
+static int
+x86_supports_tracepoints (void)
+{
+ return 1;
}
/* This is initialized assuming an amd64 target.
x86_siginfo_fixup,
x86_linux_new_process,
x86_linux_new_thread,
- x86_linux_prepare_to_resume
+ x86_linux_prepare_to_resume,
+ x86_linux_process_qsupported,
+ x86_supports_tracepoints
};
projects / deliverable / binutils-gdb.git / blobdiff